day 2 Flashcards

(68 cards)

1
Q

what cells are round the outside of colloid

A

follicular

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2
Q

what levels can discriminate between hyper, hypo and euthydroidism

A

TSH levels

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3
Q

exceptions of when low TSH and low/normal T3 and T4

A

hypopituitarism

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4
Q

tests for hyperthyroidism

A

TSH plus free T4 or T3

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5
Q

tests for hypothyroidism

A

TSH plus serum free T4

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6
Q

what levels are greatly increased in pregnancy

A

TBG and total T4 but free T4 is normal.

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7
Q

what does amiodarone do

A

decrease t4 to t3 conversion and so t4 level may be higher than expected

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8
Q

what antibodies are specific for graves

A

TSH receptor IgG antibodies

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9
Q

what is the most common hypothyroidism

A

atrophic

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10
Q

what autoimmune thyroiditis leads to goitre formation

A

Hashimotos thyroiditis

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11
Q

what may cause hyperthyroidism, hypothyroidism or the 2 sequentially

A

post partum thyroiditis

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12
Q

post partum thyroididits has a high chance of proceeding to permanent

A

hypothyroidism

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13
Q

what is the mechanism of goitre

A

borderline hypothyroidism leading to TSH stimulation and thyroid enlargement in the face of continuing iodine deficiency

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14
Q

specific signs of hypothyroidism

A

dry thin hair, bradycardia, dry skin, slow relaxing reflexes

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15
Q

slow, dry haired, thick skinned, deep voiced, weight gain, cold intolerance, bradycardia and constipation is a classic picture of

A

hypothyroidism

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16
Q

what confirms primary hypothyroidism

A

high TSH levels with low T4

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17
Q

why should complete suppression of TSH be avoided

A

risk of atrial fib and osteoporosis

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18
Q

pregnant woman should have optimal replacement as mothers with elevated TSH during pregnancy can result in kids with

A

reduction in cognitive function

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19
Q

severe hypothyroidism may present with

A

confusion or even coma

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20
Q

what mental health illness is common in hypothyroidism

A

depression

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21
Q

nearly all cases of hyperthyroidism are caused by

A

intrinsic thyroid disease

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22
Q

most common cause of hyperthyroidism

A

graves disease

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23
Q

what condition produces antibodies that pretend to be TSH

A

graves

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24
Q

signs of thyrotoxicosis, diffuse goitre and extra thyroidal manifestations eg opthalmopathy

A

graves

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25
signs of thyrotoxicosis, palpable solitary nodule or multinodualr goitre
solitary multinodular thyrotoxicosis
26
signs of thyrotoxicosis, diffuse goitre and tender on palpation
thyroiditis
27
specific signs of hyperthyroidism
tremor, hyperkinesis (excessive restlessness), tachycardia or atrial fibrillation, full pulse, warm vasodilator peripheries, exophthalmus( bulging eyes), lid lag and stare (upper eyelid retraction), goitre bruit
28
what is transient hyperthyroidism from an acute inflammatory process, probably viral in orgin
de quervains thyroiditis
29
what may flow after de quervains thyroiditis after a few weeks
hypothyroidism
29
what may flow after de quervains thyroiditis after a few weeks
hypothyroidism
30
treatment of de quervains thyroiditis
acute phase - aspirin short term in severely symptomatic - prendisolone
31
what drug has high iodine content
amiodarone
32
some cancer drugs eg ipilimumab can cause
thyroiditis
33
what is infiltration. of the skin on the shin
pretibial myxoedema
34
frequently present with atrial fib is common in elderly in
hyperthyroidism/ graves - not sure which one
35
children with excessive height, weight gain and hyperactivity have
hyperthyroidism
36
very useful clinical symptom of hyperthyroidism
weight loss despite normal appetite
37
signs that differentiate hyperthyroidism from anxiety
eye signs, diffuse goitre, proximal myopathy and wasting
38
what confirms the diagnosis fo hyperthyroidism
serum TSH is suppressed and raised free T3 or T4
39
antibodies seen in graves
TSH receptor stimulating antibodies and thyroid peroxidase antibodies (TPO) Tsh is 97-99% specific for graves TPO are present in80% of graves but are also found in normal individuals
40
most used anti thyroid drug in UK
carbimazole
41
what is another option that is also an antithyroid drug
propylthiouracil
42
how long does it take for anti thyroid drugs. to work
10-20 days
43
what drug can provide symptomatic control in hyperthyroidism
beta blockers eg propanolol
44
what % of patients relapse after a course of carbimazole or propylthiouracil within the following 2 years
50
45
side effects of carbimazole
angranuclocytosis may develop sore throat or unexplained fever and should have white blood cell counted
46
when is radioactive iodine contraindicated
pregnancy and while breast feeding
47
patients should not be on antithyroid drugs when on
radio iodine
48
is there increased risk of malignancy after radioactive iodine
no
49
some drugs given in thyroid storm
propranolol immediately, potassium iodide, antithyroid drugs, corticosteroids
50
what is the preferred antithyroid drug at conception and during first trimester
propythiouracil
51
why is propythiouracil given during conception and first trimester in hyperthyroidism
due to rare reports of congenital abnormalities
52
why is carbimazole recommended during 2 and 3 trimester
as liver problems more frequently described on PTU
53
high levels of HCG found in pregnancy causes what to TSH receptor and t3 and t4
suppressed TSH with slightly elevated T3/4
54
if a mother has ever had graves she may still have circulating thyroid stimulating immunoglobulin and so
may stimulate metal thyroid and so foetus can become hyperthyroid
55
what do you measure in foetus for thyroid status
foetal heart rate
56
thyroid hormone resistance is an -- condition
inherited
57
what is mutated and abnormal in thyroid hormone resistance
thyroid hormone receptor
58
thryroid hormone resistance is diagnosed on basis of
raised t3/4 and normal TSH
59
long term risk of hyperthyroidism may cause
osteoporosis and atrial fib which may predispose to thromboembolic disease
60
graves orbitopathy can cause swelling and oedema of the muscles around the eye leading to
limitation of movement and proptosis
61
proptosis and lid retraction in graves may limit the ability to
close eyes completely
62
is goitre physiological or pathological
can be either
63
excessive doses of what will induce goitre
carbimazole or PTU
64
what Amy produce a diffuse increase in size of the thyroid
puberty and pregnancy
65
goitre which is smooth and soft and may be associated with thyroid growth stimulating antibodies
simple goitre
66
what 2 diseases are associated with firm diffuse goitre of variable size
Hashimoto's thyroididits and graves disease thyrotoxicosis
67
when is a bruit in a goitre often present
thyrotoxicosis